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javaspringspring-mvcthymeleafapplicationcontext

How avoid calling setApplicationContext on a SpringResourceTemplateResolver?

I'm currently setting up a Spring MVC project with Thymeleaf, following the tutorial at: http://www.thymeleaf.org/doc/tutorials/3.0/thymeleafspring.html#spring-mvc-configuration

Trying to KISS the code, I first replaced implements ApplicationContextAware and the setter method with @Inject private ApplicationContext applicationContext. But I don't understand why I have to call setApplicationContext() on the SpringResourceTemplateResolver while it inherits the Spring interface ApplicationContextAware.

How to avoid this?

Edit: If I remove the templateResolver.setApplicationContext(applicationContext); line, I get this exception when accessing the root:

java.lang.IllegalArgumentException: Application Context cannot be null
    org.thymeleaf.util.Validate.notNull(Validate.java:37)
    org.thymeleaf.spring4.templateresource.SpringResourceTemplateResource.<init>(SpringResourceTemplateResource.java:64)
    org.thymeleaf.spring4.templateresolver.SpringResourceTemplateResolver.computeTemplateResource(SpringResourceTemplateResolver.java:69)
    org.thymeleaf.templateresolver.AbstractConfigurableTemplateResolver.computeTemplateResource(AbstractConfigurableTemplateResolver.java:1221)
    org.thymeleaf.templateresolver.AbstractTemplateResolver.resolveTemplate(AbstractTemplateResolver.java:356)
    org.thymeleaf.engine.TemplateManager.resolveTemplate(TemplateManager.java:840)
    org.thymeleaf.engine.TemplateManager.parseAndProcess(TemplateManager.java:608)
    org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1087)
    org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1061)
    org.thymeleaf.spring4.view.ThymeleafView.renderFragment(ThymeleafView.java:335)
    org.thymeleaf.spring4.view.ThymeleafView.render(ThymeleafView.java:189)
    org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1257)
    org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1037)
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:980)
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
    org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
    org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

Note: I use the latest versions: Spring 4.3.3.RELEASE and Thymeleaf 3.0.2.RELEASE (of course I imported thymeleaf-spring4).

Solution

  • After re-checking what I missed, it appears the missing @Configuration annotation is the source of Spring not injecting the ApplicationContext into the SpringResourceTemplateResolver.